Switch full-codegen from StackHandlers to handler table.

src/arm/code-stubs-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 1058 matching lines @@
   }
 
   // Retrieve the handler context, SP and FP.
   __ mov(cp, Operand(pending_handler_context_address));
   __ ldr(cp, MemOperand(cp));
   __ mov(sp, Operand(pending_handler_sp_address));
   __ ldr(sp, MemOperand(sp));
   __ mov(fp, Operand(pending_handler_fp_address));
   __ ldr(fp, MemOperand(fp));
 
-  // If the handler is a JS frame, restore the context to the frame.
-  // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
-  // or cp.
+  // If the handler is a JS frame, restore the context to the frame. Note that
+  // the context will be set to (cp == 0) for non-JS frames.
   __ cmp(cp, Operand(0));
   __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne);
 
   // Compute the handler entry address and jump to it.
   ConstantPoolUnavailableScope constant_pool_unavailable(masm);
   __ mov(r1, Operand(pending_handler_code_address));
   __ ldr(r1, MemOperand(r1));
   __ mov(r2, Operand(pending_handler_offset_address));
   __ ldr(r2, MemOperand(r2));
   if (FLAG_enable_ool_constant_pool) {
@@ skipping 82 matching lines @@
 
   // Block literal pool emission whilst taking the position of the handler
   // entry. This avoids making the assumption that literal pools are always
   // emitted after an instruction is emitted, rather than before.
   {
     Assembler::BlockConstPoolScope block_const_pool(masm);
     __ bind(&handler_entry);
     handler_offset_ = handler_entry.pos();
     // Caught exception: Store result (exception) in the pending exception
     // field in the JSEnv and return a failure sentinel.  Coming in here the
-    // fp will be invalid because the PushTryHandler below sets it to 0 to
+    // fp will be invalid because the PushStackHandler below sets it to 0 to
     // signal the existence of the JSEntry frame.
     __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                          isolate())));
   }
   __ str(r0, MemOperand(ip));
   __ LoadRoot(r0, Heap::kExceptionRootIndex);
   __ b(&exit);
 
-  // Invoke: Link this frame into the handler chain.  There's only one
-  // handler block in this code object, so its index is 0.
+  // Invoke: Link this frame into the handler chain.
   __ bind(&invoke);
   // Must preserve r0-r4, r5-r6 are available.
-  __ PushTryHandler(StackHandler::JS_ENTRY, 0);
+  __ PushStackHandler();
   // If an exception not caught by another handler occurs, this handler
   // returns control to the code after the bl(&invoke) above, which
   // restores all kCalleeSaved registers (including cp and fp) to their
   // saved values before returning a failure to C.
 
   // Clear any pending exceptions.
   __ mov(r5, Operand(isolate()->factory()->the_hole_value()));
   __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress,
                                        isolate())));
   __ str(r5, MemOperand(ip));
@@ skipping 16 matching lines @@
     ExternalReference entry(Builtins::kJSEntryTrampoline, isolate());
     __ mov(ip, Operand(entry));
   }
   __ ldr(ip, MemOperand(ip));  // deref address
   __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
 
   // Branch and link to JSEntryTrampoline.
   __ Call(ip);
 
   // Unlink this frame from the handler chain.
-  __ PopTryHandler();
+  __ PopStackHandler();
 
   __ bind(&exit);  // r0 holds result
   // Check if the current stack frame is marked as the outermost JS frame.
   Label non_outermost_js_2;
   __ pop(r5);
   __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
   __ b(ne, &non_outermost_js_2);
   __ mov(r6, Operand::Zero());
   __ mov(r5, Operand(ExternalReference(js_entry_sp)));
   __ str(r6, MemOperand(r5));
@@ skipping 4040 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM